Certain 1-(1,3,4-thiadiazol-2-yl)-imidazolidinone-(2) compounds

ABSTRACT

Certain novel 1-(1,3,4-thiadiazol-2-yl)-imidazolidinone-(2) compounds of the formula:

United States Patent Metzger et al.

CERTAIN i HiZ fiEXiiiXiBi-EYLY- IMIDAZOLIDINONE-(Z) COMPOUNDS Inventors: Carl Metzger, Wuppertal-Elberfeld; Dietrich Rucker, Bietigheim; Ludwig Eue, Koeln, all of Germany Assignee: Bayer Aktiengesellschalt,

Leverknsen, Germany Filed: Mar. 10, 1971 Appl. No.: 123,013

Foreign Application Priority Data Mar. 20, 1970 Germany P 20 13 406.9

US. Cl. lilo/306.8 D, 71/90 Int. Cl C07d 99/08 Field of Search 260/306.8 D

References Cited OTHER PU BLlCATlONS Mayer et al., Chem. Abstracts.

Primary Examiner-Richard J. Gallagher Attorney-Burgess, Dinklage & Sprung 1 Sept H8, 1973 [57] ABSTRACT Certain novel I-( l ,3,4-thiadiazol-2-yl)- imidazolidinone-(Z) compounds of the formula:

R'! I L in which R is hydrogen, alkyl, haloalkyl, cycloalkyl, alkoxy, alkoxyalkyl, halocycloalkyl, alkoxyalkylthio,

11 Claims, No Drawings CERTAIN l 1 ,3,4-THIADlAZOL-2-YL)-IMIDAZOLIDINONE- (2) COMPOUNDS The present invention relates to certain new l-( 1,3,4- thiadiazol-2-yl)-imidazolidinone-(2) derivatives, to herbicidal compositions containing them and to their use as herbicides.

It is known that thiazolylureas, for example 1-(4- methyl-l,3-thiazol-2-yl)-3-methylurea, can be used as herbicides from Belgian Pat. Specification No. 679,138. The herbicidal potency of these previously known ureas, however, is relatively low and therefore not always satisfactory under conditions of actual practice.

It was therefore surprising that certain thiadiazolyl imidazolidinone compounds according to the invention exhibit higher herbicidal activity and, at the same time, greater selectivity in respect of cultivated plants, than the previously known thiazolylureas. The active compounds according to the invention therefore represent a substantial enrichment of the art.

Specifically, the present invention provides l-( 1,3,4- thiadiazol-Lyl)-imidazolidinone-(2) derivatives of the general formula:

OTE B IE NN I l mt.

in which R is hydrogen, alkyl, haloalkyl, cycloalkyl, alkoxy, alkoxyalkyl, halocycloalkyl, alkoxyalkylthio, unsubstituted and substituted aryl, alkenyl, alkylthio, (optionally substituted) aralkylthio, alkenylthio, alkynylthio, alkylsulfoxy, alkylsulfonyl, alkenylsulfoxy, alkenylsulfonyl, alkynylsulfoxy, alkynylsulfonyl, aralkylsulfoxy or aralkylsulfonyl,

R is lower alkyl, alkenyl or alkynyl, and

R is lower alkyl or alkenyl.

R is preferably hydrogen, alkyl of from one to four carbon atoms, haloalkyl of from one to four carbon atoms, cycloalkyl of from five to eight carbon atoms, alkoxy of from one to four carbon atoms, alkoxyalkyl of from in each case, one to four carbon atoms in the alkyl radicals, halocyclalkyl of from five to eight ring carbon atoms, alkoxyalkylthio of from, in each case, one to four carbon atoms in the alkyl radicals, (possibly substituted) aryl of from six to ten carbon atoms, alkenyl of from three to six carbon atoms, alkynyl of from two to five carbon atoms, alkylthio of from one to four carbon atoms (possibly substituted) aralkylthio of from six to ten carbon atoms in the aryl radical and one to four carbon atoms in the alkyl radical, alkenylthio with two to four carbon atoms, (possibly substituted) aralkylthio of from six to ten carbon atoms in the aryl radical and one to four carbon atoms in the alkylene radical, alkenylthic of from two to four carbon atoms, alkynylthio of from three to six carbon atoms, alkylsulfoxyl 1 of from one to four carbon atoms, alkylsulfonyl of from one to four carbon atoms, alkenylsulfoxyl of from two to four carbon atoms, alkenylsulfonyl of from two to four carbon atoms, alkynylsulfonyl of from three to six carbon atoms, aralkylsulfoxyl and aralkylsulfonyl of from, in each case, six to 10 carbon atoms in the aryl radical and one to four carbon atoms in the alkylene radical.

R is preferably alkyl of from one to four carbon atoms, or alkenyl or alkynyl of from, in each case, two to five carbon atoms.

R is preferably alkyl of from one to four carbon atoms or alkenyl of from two to four carbon atoms.

It has surprisingly been found that these compounds exhibit strong herbicidal properties.

The invention also provides a process for the production of a l-(1,3,4-thiadiazol-2-yl)-imidazolidinone-(2) derivative of the formula (I) in which a l-(l,3,4-

thiadiazol-Z-yl)-4,5-dihydroxyimidazolidinone-(2) of the general formula:

wflmw... m...

N-N B l S \O/ (11) in which R and R have the meanings stated above is reacted with an alcohol of the general formula:

R -OH (Ill) in which R has the meaning stated above in the presence of an acidic catalyst.

If l-( S-trifluoromethyll ,3 ,4-thiadiazole-2-yD-3- methyl-4,5-dihydroxylimidazolidinone-(2) and methanol are used as starting materials, the reaction course can be represented by the following reaction scheme:

(I)H ()H NN I l 69 IMO-IL J-N N-CH: CHaOH S H20 OH OCH; N-N cJL N-CH:

CF I I H-CH; b

l() ml of a 30 percent strength aqueous solution of glyoxnl (which solution had been adjusted to pH 7-8 with dilute sodium hydroxide solution) were added dropwise to a solution of 45.4g (0.2 mole) N- (trifluoromethyl-l ,3,4-thiadiazol-2-yl )-N-methylurea in 500 ml ethanol. After standing overnight, the solvent was distilled off in a vacuum, and water was added to the residue. After recrystallization from acetonitrile, l -trifluoromethyl-l ,3 ,4-thiadiazol-2-yl)-3-methyl- 4,5-dihydroxyimidazolidinone-(2) was obtained crystalline form; melting point: 178 C.

In analogous manner, the following compounds were prepared:

b. l-(5-methylthiol ,3 ,4-thiadiazoI-2-yU-3-methyl-4- 5-dihydroxy-imidazolidinone-(2) of the melting point 55 C.

c. l-( S-methylsulfonyl-l ,3 ,4-thiadiazol-2-yl)3- methyl-4,5-dihydroxy-imidazoIidinone-(2) of the melting point 67 C.

As diluents for the reaction according to the invention of the l-( l ,3,4-thiadiazol-2-yl)4,5-dihydroxyimidazolidinones-(2) of the formula (II) with alcohols of the formula (III), all inert organic solvents are suitable. Preferably, however, an excess of the alcohol of the formula (III), as for example methanol, ethanol npropanol or isopropanol, is used as diluent.

As acidic catalysts, all strong acids can be used; concentrated sulfuric acid is particularly suitable.

The reaction temperatures can be varied within a fairly wide range. In general, the reaction is carried out at 0 to 150 C, preferably to 120 C.

In a suitable way of carrying out the process according to the invention, a solution of the irnidazolidinone derivative of the formula (II) is boiled under reflux in an excess of the alcohol with the addition of a small amount of a strong acid.

Working up may take place in customary manner. The reaction products can be purified by recrystallization.

EXAMPLE 1 Preparation of l-(S-methylsulfonyl-l,3,4-thiadiazol- 2-yl)-3-methyl-4-methoxy-5-hydroxyimidazolidinone- (2) 0H OCH. ON-Nfi LL L J- N-CH: ii 5 EXAMPLES 2 19 In manner analogous to that of Example I, the compounds listed in the following Table were also prepared. The compounds produced are identified by the meanings of R. R and R. in formula (I). set forth.

TABLE Example R R R' elting point (Cl 2 CF, CH, CH, 148 3 CH,S0, CH, C,H, 141 4 tert.-C,H, CH, CH, 161 5 terLCJ-l, CH, C,H, 117 6 tert.-C,H, CH, i-C,H-, I48 7 tert.-C,H, CH, n-C,H-, 102 8 CH, CH, C,H, 97 9 CF CH, CH(CH,), 102 I0 CH,S CH, CH, 132 l l CH,S CH,C,H, I32 12 C,H,S CH, CH, 93 13 c,u,s cu, cm, 9'! l4 n-CJLS cu, CH, 99 t5 n-C,H-,S CH, C,H, 95 I6 i-C,H-,S CH, CH, 64 I7 i-C,H,S CH, C,H, 94 I8 n-CJ-LS CH, CH, 82 I9 n-C,H,S CH, C,H, 92

The active compounds according to the invention have excellent herbicidal properties and can therefore be used for the control of weeds. By weeds in the widest sense are meant all plants which grow in places where they are not desired. Whether the substances according to the invention act as total or as selective herbicides depends essentially on the amount applied.

The substances according to the invention can be used for example in the case of the following plants: dicotyledons, such as mustard (Sinapis), cress (Lepidium), cleaver (Galium), common chickweed (Stellaria), mayweed (Matricaria), smalltlower Galinsoga (Galinsoga), fat hen (Chenopodium), stinging nettles (Urtica), grOundseI (Senecio), cotton (Gossypium beets (Beta), carrots (Daucus), beans (Phaseolus), po tatoes (Solarium), cofi'ee (Cofiea); monocotyledons, such as timothy (Phleum), bluegrass (Poa), fescue (Festuca), goosegrass (Eleusine), foxtail (Setaria), ryegrass (Lolium), cheat (Bromus), barnyard grass (Echinochloa), maize (Zea), rice (Oryza), oats (Avena), barley (Hordeum), wheat (Triticum), millet (Panic-um), sugar cane (Saccharum).

The compounds are especially suitable for selective weed control in cereals, cotton, sugar-beet and other cultivations. They can advantageously also be used for the control of spring wild oats.

The active compounds according to the present invention can be converted into the usual formulations, such as solutions, emulsions, suspensions, powders, pastes and granulates. These may be produced in known manner, for example by mixing the active compounds with extenders, that is, liquid or solid diluents or carriers, optionally with the use of surface-active agents, that is emulsifying agents and/or dispersing agents. In the case of the use of water as an extruder, organic solvents can, for example, also be used as auxiliary solvents.

As liquid diluentsor carriers, there are preferably used aromatic hydrocarbons,.such as xylenes or benzene, chlorinated aromatic hydrocarbons, such as chlorobenzenes, paraffins, such as mineral oil fractions, alcohols, such as methanol or butanol, or strongly polar solvents, such as dimethyl formamide or dimethyl sulfoxide, as water.

As solid diluents or carriers, there are preferably used ground natural minerals, such as kaolins, clays,

talc or chalk, or ground synthetic minerals, such as highly-dispersed silicic acid or silicates.

Preferred examples of emulsifying agents include nonionic and anionic emulsifiers, such as polyoxyethy- 6 to l5 kg/hectare.

Theactive compounds can be used before or after the emergence of the cultivated plants and the weeds, especially before the emergence.

lene-fatty acid esters, polyoxyethylene-fatty alcohol 5 The active compounds according to the invention ethers, for example alkylarylpolyglycol ethers, alkyl also exhibit insecticidal properties and also act against sylfonates and aryl sulfonates; and preferred examples mosquito larvae. of dispersing agents include lignin, sulfite waste liquors The invention therefore provides a herbicidal comand methyl cellulose. position containing as active ingredient a compound The active compounds according to the invention according to the invention in admixture withasolid dilmay be present in the formulations in admixture with uent or carrier or in admixture with a liquid diluent or other active compounds or may be mixed therewith at carrier containing a surface-active agent. the time of application. The invention also provides a method of combating The formulations contain, in general, 0.1 to 95, prefweeds which comprises applying to the weeds or a erably 0.5 to 90, per cent by weight of active comweed habitat a compound according to the invention pound. alone or in the form of a composition containing as ac- The active compounds can be applied as such or in tive ingredient a compound according to the invention the form of their formulations or of the application in admixture with a solid or liquid diluent or carrier. forms prepared therefrom, such as ready-to-use solu- The invention also provides crops protected from tions, emulsions, suspensions, powders, pastes and damage by weeds by being grown in areas in which, imgranulates. Application may take place in the usual mediately prior to and/or during the time of the growmanner, for example by spraying, squirting, dusting or ing, a compound according to the invention was apscattering. plied alone or in admixture with a solid or liquir diluent When the compounds are applied as total herbicides, carrier. It will be seen that the invention can improve the amounts of active compound are generally to 25 usual methods of providing harvested crops. kg/hectare. 1n selective weed control, the applied The invention is illustrated by the following Examamounts are generally 1 to 20 kg/hectare, preferably 2 pics in which the test compounds were as follows:

Compound No. Chemical name Structure 1 I-(S-metggISuIIOHyI-I,3,4-thiadiaz0l-2-yl)-3-methyI-4-rnethoxy-5-hydroxyimidazolidi- CIJH (M3113 o H l \i F1 CHa-S N CH; II S Y o 2 1-(5-methy1sull0nyl 1,3,4-thindiazol-2-y1)-3-methyl-4-ethoxy-5-hydroxyimidazolidinone-(2) 0H OC Hg,

N--N w l l i w o 3 l-(5-tert. butyl-l,3,4-thludlazol-Z-yl)-3-mcthyl-4-ethoxy5-hydroxyimidnzolidinonc-(2) 011 002115 ll? t-C4H\7"C CN N-CH:

4 1-(5-tert. butyl-l,3,4-thiadiazo1-2-yl)-3methyl-4-methoxy-5-l1ydroxyimldazolldinonc-(ZZ) 0H ()CII5 N--N *1 ll g to Ht-C\ /N-CH:

s c H 0 5 1-(5-tert butyl-l,3,-l-tliiadiazol l-yl)-3-n1ethyl-4-isoproxy-5-hydroxyimidazolidinone-(2) OH OCH;

N-N ll ll l.-C4Hv-C N\ /N'CH3 s 0 ll 6 l-(5-trifluorornetliyl-l,3,4thiaziazol-2-yl)-3-methy1-4-rnethoxy-5-hydroxy-imjdazo1idinone-(2).

3,759,939 7 8 EXAMPLE A EXAMPLE B Pre-emergence test Post-emergence test Solvent: parts by weight acetone solvent 5 Parts y Weight aceione Emulsifier: 1 part by weight alkylarylpolygolycol fielr 1 part by weight alkylarylpolyglycol ether 5 ether To produce a suitable preparation of active com- To Produce a suitabie Preparation of active pound, one part by weight of active compound was P Flart y Weigh of active compound was mi d i h h stated amount f solvent, h stated mixed with the stated amount of solvent, the stated amount of emulsifier was added and the concentrate amount of emulsifier as ad ed and the concentrate was then diluted with water to the desired concentra- 10 was then ed ith water to the desired concentration, tion.

Seeds of the test plants were sown in normal soil and, Test Plants ch have a height of about 5-15 cm. after 24 hours, watered with the preparation of the acwere prayed ith the preparation of the active comtive compound. It was expedient to keep constant the pound 0 that the amounts of active compound per unit amount of water per unit area. The concentration of area ich are Stated in the Table were applied. Dethe active compound in the preparation was of no impending on the concentration of the spray liquor, the portance, only the amount of active compound applied ount o ater applied lay between 1,000 and 2,000 per unit area being decisive. After three weeks, the deectaregree of damage to the test plants was determined and After three weeks, the degree of damage to the plants characterized by the values 0-5, which have the followas dete m ed a Characterized y the Values ing meaning: which have the following meaning:

0 no effect 0 no effect l slight damage or delay in growth l a few slightly burnt spots 2 marked damage or inhibition of growth 2 marked damage to leaves 3 heavy damage and only deficient development or 3 some leaves and parts of stalks partially dead only percent emerged 4 plant partially destroyed 4 plants partially destroyed after germination or 5 plant completely dead.

only 25 percent emerged The active compounds, the amount applied and the 5 plants completely dead or not emerged. 30 results can be seen from Tables 3 and 4.

The active compounds, the amount applied and the results obtained can be seen from Tables 1 and 2.

TABLE. 1.-PREEMERUENCE TEST Active compound applied kg./ Avena Sina- Poly- Echino- Galin- Matri- Sugarhectare fatun pis gonum chloa soga caria Wheat beet Active compound 54 100200 0 55544555545544 M m if it; 1 3 M 531 "100210 M rwrw44 4444344 33 Ar 1 w 4 4 8 Lu W 544 554 555 PM .rw44:mr u= o5455= v4 M 4 4 444% 44 l\ 555554555555 54 M. 555555 m L 4 PM. 55555555555 55 mm 432 5M455% M0 ism 55555555555 444 u Ll 543 5 05 4 h 55 5555 555 5 wm 412 i 331 55555 l 0.. mm 555555555555544 m. .ud Co 4 32 55 55 p a 9" n flr dfJ-Dfd555555-D44 0 E nl 4 3 L 0.05 .05 55 B an 1 .1 A P 2 2 2 T Tn 555 m55555555 u2 i 1 w k4 m K h m 555555555 5M U mp. n S t 0 m m wmwmm mm mawm uazm ma nuukm L 1 1 U wn n ma h t 0 c N u n u u a n u u u u H H u u n H a 4 t H N n u H r O C u n v n H u H n H N H u n u u d n H S u n m w m u m 1 2 O. 3 4 5 N n d d m d d d W m m o m m m Clo n m o N m 0 u H k n. D v P a m m n m m m H t 0 c o 0 o C (v C A C C C TABLE 3.-POS'I-EME R GENCY TEST Active compound known) Compound 1- Compound 6 c-... r

TABLE 4.-POST-E MEI tGENCE TEST Active com pound applied kg./ Echino- Cheno- Sina- Galin- Stel- Ur- Matri- Car- Cothectare chloa podium pis soga laria tica caria rots Oats ton heat Beans Active compound Compound3 Compound 4 H Compound 5 4. Compound as claimed in claim 1 wherein R is alkylthio of from one to four carbon atoms in the alkyl moiety.

5. Compound as claimed in claim 1 wherein R is a al- 40 kyl-sulfur group wherein the sulfur atom may be in any What is claimed is: oxidation state. 1. 1-(l,3.4-Thiadiazol-2-yl)-imidazolidinone-(2) 6. Compound as claimed in claim 1 designated l-(5- compounds of the general formula: methylsulfonyl-l,3,4-thiadiazol-2-yl)-3-methyl-4- methoxy-S-hydroxyimidazolidinone-( 2).

7. Compound as claimed in claim 1 designated 1-(5- methylsulfonyll ,3 ,4-thiadiazol-2-yl)-3-methyl-4- ethoxy-S-hydroxyimidazolidinone-(2).

8. Compound as claimed in claim I designated l-(5- tert.butyl-l ,3 ,4-thiadiazol-2-yl)-3-methyl-4-ethoxy-5 hydroxyimidazolidinone-(2).

in which 9. Compound as claimed in claim 1 designated 1-(5- R is alkyl, haloalkyl, alkylthio, alkylsulfoxyl, or alkyltenbutym ,34 thiadiazo] 2 y) 3 mehyl 4 methoxy 5-hydroxyimidazolidinone-(2).

sulfonyl, wherein the alkyl radicals have up to four carbon atoms,

R is alkyl having up to four carbon atoms.

R: is alkyl having up to four carbon atoms.

10. Compound as claimed in claim 1 designated l-(5- tert.butyl-l ,3,4-thiadiazol-2-yl)-3-methyl-4-isoproxy- 5-hydroxyimidazolidinone-(2). 2. Compound as claimed in claim 1 wherein R is alkyl 1 L Compound as claimed in claim 1 designated of from one to four 'f trifluoromethyl-l ,3,4-thiadiazol-2-yl)-3-methyl-4- 3. Compound as claimed in claun 1 wherein R IS halmethoxyd hydmxyimidazo|idinone (2 oalkyl of from one to four carbon atoms. a

UNLTED s'rA'ms PA'IENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,759,939 Dated September 18, 1973 Inventor(s) Carl Metzger et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 1. line 31,

N-N (IN! OR Read on 0R R l\/|' R1 C01. 2, line 21,

( 11 (Ml For t N--N II Read rORM' Podoso 0-69, UlCOMk-DC 60370-969 Page Two UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,759,939 Dated /73 Inventor(s) Carl Metz'ger et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 4, line 12 For l CH Read f C01. 6, Line 59, (Compound 5) i 1-0 1-1 u-x z For a I D N l Col. 7, line 4,

For 9 I "alkylarylpolygolycol" Read Y alkylarylpolyglycol ORM P04 050 (0-59) I uscoMM-oc 60316-5 69 K UNITE!) b'l'A'lIL'Jb FAfll'iii'l ()FHCIS CERTIFICATE OF CO REE CTIO N m Eatent No. 939 Dated September 18, 1973 Invcntor(s) Carl Metz ger et a1 Page three It is certified that error appears in the above-identified patent and that: said Letters Patent are hereby corrected as shown below:

Col. 7 Table 2, (Compound 4 first line) in ,column under "Oats" "For 7'4" Read y Signed and sealed this iBOeh day of April 19%..

- (SEAL) Attest:

EDWARD I*T.FLETCHBR,JR. Attesting Officer C MARSHALLDANN Commissioner of Patents 

2. Compound as claimed in claim 1 wherein R is alkyl of from one to four carbon atoms.
 3. Compound as claimed in claim 1 wherein R is haloalkyl of from one to four carbon atoms.
 4. Compound as claimed in claim 1 wherein R is alkylthio of from one to four carbon atoms in the alkyl moiety.
 5. Compound as claimed in claim 1 wherein R is a alkyl-sulfur group wherein the sulfur atom may be in any oxidation state.
 6. Compound as claimed in claim 1 designated 1-(5-methylsulfonyl-1,3,4-thiadiazol-2-yl)-3-methyl-4-methoxy-5 -hydroxyimidazolidinone-(2).
 7. Compound as claimed in claim 1 designated 1-(5-methylsulfonyL-1,3,4-thiadiazol-2-yl)-3-methyl-4-ethoxy-5 -hydroxyimidazolidinone-(2).
 8. Compound as claimed in claim 1 designated 1-(5-tert.butyl-1, 3,4-thiadiazol-2-yl)-3-methyl-4-ethoxy-5-hydroxyimidazolidinone-(2).
 9. Compound as claimed in claim 1 designated 1-(5-tert.butyl-1, 3,4-thiadiazol-2-yl)-3-methyl-4-methoxy-5-hydroxyimidazolidinone-(2).
 10. Compound as claimed in claim 1 designated 1-(5-tert.butyl-1, 3,4-thiadiazol-2-yl)-3-methyl-4-isoproxy-5-hydroxyimidazolidinone-(2).
 11. Compound as claimed in claim 1 designated 1-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)-3-methyl-4-methoxy-5 -hydroxyimidazolidinone-(2). 